php - Advanced Custom Fields checkbox inside repeater -

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i'm trying use checkbox inside repeater field show different images. if user checks "chicken" , "roast" must display 2 images front-end. if nothing checked, nothing displayed.

i have tried advanced custom fields documentation , can null or these names "chicken" , "roast" front-end. piece of code inside repeater loop. 

<?php if (get_field('selection') == 'chicken') { ?>   //some piece of code  <?php } else if (get_field('selection') == 'roast') { ?>    //some more code    <?php } ?>

a checkbox creates list of check-able items. in other words, need check string in array(). example:

if( in_array( 'chicken', get_field('field_name') ) ) {     //... }

read more checkboxes in acf codex: http://www.advancedcustomfields.com/resources/checkbox/


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